Masu samar da kyamara suna jin dadin kyamaran talla ta yawan megapixels suna da. Amma menene daidai ne megapixel kuma ta yaya yake shafi hotuna?
Megapixel yana da pixels miliyan 1. Pixels ƙananan ƙananan murabba'ai ne waɗanda aka haɗa tare da su kamar ƙananan ruɗi ko mosaic don ƙirƙirar hotunanku. Za a ƙaddara ƙudurin hotonka a babban ɓangaren ta yadda yawancin waɗannan ƙananan murabba'ai suna haɗu a cikin karamin wuri.
Kyakkyawan kyamara 8 megapixel (8MP) zai sami kimanin miliyoyin miliyoyin mota na bayanai a kowace inch yayin da wayar kamara a 1.5 megapixels (1.5MP) zai sami rabi daya da rabi miliyoyin bayanai a cikin inch.
Don me menene hakan ke nufi don hotuna?
Kawai sanya, ƙarin bayani mafi kyau. Ƙarin bayani da aka saka a cikin wani yanki, mafi kyau idanunmu zasu haɗu da gefuna tare don ƙirƙirar hoton. Idan kadan ya samo asali, idanu za ta lura da gefuna da dama na pixels inda suke saduwa, kamar yadda kake gani a kowane gefen kayan ado na mosaic. "Daidai" da aka yarda don buga hotuna a halin yanzu 300dpi (dige da inch). Duk da yake dots a cikin inch ba na al'ada ba ne kamar yadda pixels per inch bambanci ba zai shafe ka ba a ranar da kake ɗaukar hoto / bugu.
Nawa bayanai ina bukatan?
Don gano yadda yawancin bayanin da kake buƙatar don ƙaddamar da girman girman duk abin da kake buƙata ya ninka girman girman ta ta ƙudurin da ake so.
Alal misali, tare da mulkin 300dpi a zuciya, don buga hoto 8x10 za ku buƙaci 2400 pixels ta hanyar 3000 pixels na bayanai. Idan kana nuna hoto a kan intanet (inda 72 pixels da inch ke karɓa) zaka buƙaci 576 pixels ta 720 pixels.
To, nawa ne megapixels na bukatan?
Kowane kyamara yana nuna bayanai a cikin ɗan gajeren bambanci amma akwai wasu "ka'idojin yatsa" za ka iya bi.
Yi shawarar abin da girman girman hoton da kake so a buga. Ga yawancin mutane wannan zai zama hoton 8x10. Ƙayyade yawan adadin pixels da ake buƙata don bugawa 300dpi (2400x3000 don 8x10). Ƙara ta gaba tare da siffofin biyu tare. Don 8x10 wannan yana fitowa zuwa pixels 7.2 miliyan, ko 7.2 megapixels. Wannan shi ne lambar MP mafi girman da kake buƙatar idan an buga shi 8x10 mafi girma wanda za a iya bugawa.
Shafin na kwafi na kowa da MP wanda aka fi so
4x6 2.1MP
5x7 3.1MP
8x10 7.2MP